David Glover has worked as a research scientist and as a teacher of mathematics and science. He has written best-selling maths and science books and CD-ROMs for all ages, from primary schoolchildren to Open University students. He loves challenging puzzles and problems!Tim Hutchinson has been working as an illustrator for the last 12 years. He has published over 40 publications in their various forms. He has worked on education books, history publications, picture books, and pop up books. He has achieved considerable recognition in particular with his own book Dylan's Day and with collaborations such as Mouseton Abbey.